Endpoint security protects the devices that connect to a network. It covers antivirus, endpoint detection and response, host firewalls, disk encryption, and patch management. The goal is to stop threats at the device level, before they spread. Traditional antivirus relied on signatures. It caught known malware and missed everything else. Modern endpoint detection and response watches behavior. A process that suddenly encrypts thousands of files gets flagged. A script that tries to disable security tools gets blocked. The shift from signatures to behavior is a real improvement, though attackers adapt.

Endpoint security is not just software. It includes policies: require disk encryption, enforce screen locks, restrict USB drives, and patch within a defined window. It includes training: teach users to recognize phishing and report suspicious activity. It includes response: when an endpoint is compromised, isolate it from the network, preserve evidence, and rebuild rather than clean. Rebuilding is slower but more reliable. Malware can hide in places that cleanup tools miss. The best endpoint security assumes some devices will be compromised. The question is how fast you detect it and how much damage it does before you contain it.

Endpoint security controls

• Antivirus and EDR — detect and respond to threats
• Disk encryption — protect data if a device is lost
• Patch management — close known vulnerabilities
• Host firewall — restrict inbound and outbound traffic
• Application control — allow only approved software

Endpoints are where attackers land. Defending them is not optional.